The ISL6308 is a three-phase PWM control IC with integrated MOSFET drivers. It is suitable for high current low voltage point-of-load converters, embedded applications, and other general purpose low voltage medium to high current applications. The integration of power MOSFET drivers into the controller IC allows for a cost and space saving power management solution.
The ISL6308 is a three-phase PWM control IC featuring integrated MOSFET drivers designed to reduce external component count and save space. It supports 1, 2, or 3-phase operation and provides precision output voltage regulation with system accuracy of +0.8% for lower reference voltages and +0.5% for higher ones.
The device utilizes a unique combination of DCR (inductor resistance) and t(on) current sensing methods to achieve load line positioning and accurate channel-current balance. It includes advanced protection features such as multi-tiered overvoltage protection, overcurrent protection set via an external resistor, and open sense-line protection.
| Phase Operation | 1, 2, or 3 Phase |
|---|---|
| System Accuracy (REF=0.6V/0.9V) | +/- 0.8% |
| System Accuracy (REF=1.2V/1.5V) | +/- 0.5% |
| Maximum Output Voltage | 2.3V |
| Operating Frequency | up to 1.5MHz per phase |
| Supply Voltage PVCC | 5V to 12V +/- 5% |
The on-chip DAC supports four fixed reference voltage values selectable via a two-bit code: 0.6V, 0.9V, 1.2V, and 1.5V.
It uses a combined method of DCR (inductor resistance) current sensing for load line positioning and t(on) current sensing for accurate channel-current balance.
It is suitable for high-current DDR/chipset core voltage regulators, low-voltage DC/DC converters, and FPGA/ASIC power supplies.